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Demious

P3D2.3 and ASN Huge FPS drop

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From what I understand was the performance improvement for P3D2.3 in the first place aimed at better performance with clouds(weather engine) and from what I read would the ASN update also improve performance, so I'm a little confused to see that when I turned on ASN with the same settings as in P3D2.2(just 2 cloud layers, draw distance of 80) my FPS dropped by more than 20FPS, while in 2.2 that was only a drop of 10FPS with comparable weather (just cloudy, no rain, no storm).

Wasnt the whole idea behind the updates to be able to use more cloud layers, a better draw distance and be able to turn cloud shadows on? I've got 10-14FPS left, while in 2.2 I still could count on 20-25FPS.

 

I also notice that when I set my cloud draw distance to 80 in ASN, it pushes my cloud draw distance in P3D back to 70 and with cloud draw distance 70 in ASN, the cloud draw distance in P3D is pushed back to 60.

 

Anyone who can shed some light on this?


Sorry for the multiple posts, server kept disconnecting... :(

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Hehe, not my finger, but the Avsim server kept disconnecting while posting. :P

 

I also wrote it on the ASN forum, but since there is more response on this forum, I also posted it here.

 

I saw that others dont have problems with it, that's why I dont understand what's happening, I had everything working just fine after 2.3 install, nice FPS from 30-35 and with less impact from ASN it would be perfect... Didnt expect to see what's happening now.

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Update is released, you can download it from the Hifi forums.

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I found the problem!

I had saved the 'Clears All Weather'-option for my default flight, but now I noticed it wasnt saved properly and every time I saved it P3D still started up with 'User Defined Weather' set.

Had to save multiple times before the setting indeed was properly saved and now I get 25-30FPS, so thats very nice! :D

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I found the problem!

I had saved the 'Clears All Weather'-option for my default flight, but now I noticed it wasnt saved properly and every time I saved it P3D still started up with 'User Defined Weather' set.

Had to save multiple times before the setting indeed was properly saved and now I get 25-30FPS, so thats very nice! :D

Maarten - I can't tell you how much it is appreciated when someone posts a problem AND let's us know they resolved it! As a beta tester for ASN, I spent a lot of time chasing ghosts because a poster never let us know the problem was HIS not OURS. 

 

Again, thank you!

 

Vic

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You're most welcome and thank you for the appreciation. :)

 

Those forums are for problems ánd solutions, I think it's a small effort to finish the story with the solution (if possible of course), so it might help others. Would be quite selfish to find the solution and dont share it, while I do share the problem...

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I don't understand....don't you want User Defined Weather?  That is how ASN controls such weather...again, I don't understand how this was a problem for low FPS generation??!!

 

Please explain, Demious, and thanks.

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If ASN is running, it will IGNORE any settings in P3D.

 

Vic

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I thought it directly took control of the weather so it didn't matter what was set because it was overridden anyways?

 

Confused

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I have the same problem of saving All Clear on the weather and clouds just there when sim had started. I am wondering if there is a save file Prepar3d is using once sim begins and is there a way to clear this saved Prepar3d file?

 

Thanks for bringing that particular point up

Steve

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As mentioned it's completely irrelevant what the Weather menu says in FSX/P3D, if ASN is running and the AS-Connect module is installed and working properly (i.e. you get no error warnings from ASN) then ASN has full control over the weather. Saving a different weather setting with a default flight has no influence over ASN's ability to control the weather. The only thing you may see is the weather morphing from what was saved with the default flight, to what ASN is injecting after loading it, but only if you start ASN after the sim has already loaded to a flight. You should be starting ASN first anyway to avoid that scenario.

 

Hifi Beta Tester.

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My experience with ASN/P3D v2 is that an active and connected ASN will always override any weather theme settings. It looks like that this behavior is still the same with the ASN SP1 as before.

Spirit

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As mentioned it's completely irrelevant what the Weather menu says in FSX/P3D, if ASN is running and the AS-Connect module is installed and working properly (i.e. you get no error warnings from ASN) then ASN has full control over the weather. Saving a different weather setting with a default flight has no influence over ASN's ability to control the weather. The only thing you may see is the weather morphing from what was saved with the default flight, to what ASN is injecting after loading it, but only if you start ASN after the sim has already loaded to a flight. You should be starting ASN first anyway to avoid that scenario.

 

Hifi Beta Tester.

Then I don't understand the problem/solution of the OP.

 

Harry

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It was most likely a coincidental transient issue with performance on his PC, there are a million and one things that can cause temporary performance problems.

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I'm not a software expert, I cant tell you what is happening in the software, only what I see happening on the monitors.

Some time ago I read in a post or an article that for use with external weather engine the internal weather has to be set to clear weather, so I always did this and because everything was working properly, I never thought about it.

 

ASN was injecting the right weather and all ASN functions worked properly, there was no problem there, only the very low FPS. So from what I was used to do, from the article I read, I changed the setting to clear weather when I saw it was set to something else and that solved the problem...

The FPS immediately went back up to around 25 and changing the setting back to user defined made the FPS drop again. If I would have more information I'd be happy to tell you, but my expertise doesnt go any further, I'm afraid.

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Hi,

 

In fsx/p3d the "user defined weather" means that the weather info is first stored in each station and then internally the sim converts the station data to the final depiction using the internal "grid system". 

 

In theme mode (which ASN uses), the data are directly written to the "grid system". When switching from user defined to theme mode, in theory all the station data should be cleared (as is done in fsx) and then recalculated from the grid data. This may not work ok in P3D (I remember a similar issue a year ago when testing with v 1.4- In that case the p3d theme could not be loaded at all). 

 

These "station left-overs" may be in conflict with the grid data, reducing performance. I am not sure, so I can only speculate about this. 

 

You could do a simple test without ASN (or any engine running) where you could test this by switching in P3D from user defined to theme mode (just load a standard theme file, with similar conditions to the user defined weather set previously). If the performance drop is significant, then may be we should report that to LM.

 

Another possibility is this to be related only to the default flight and some things, when initialized on P3D startup, fail to clean properly. Not sure.

 

In any case, I find this very interesting (and I want to thank Maarten for this valuable observation).

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ASN was injecting the right weather and all ASN functions worked properly, there was no problem there, only the very low FPS. So from what I was used to do, from the article I read, I changed the setting to clear weather when I saw it was set to something else and that solved the problem...

The FPS immediately went back up to around 25 and changing the setting back to user defined made the FPS drop again. If I would have more information I'd be happy to tell you, but my expertise doesnt go any further, I'm afraid.

 

This is really interesting - thanks for posting Maarten. I have exactly the same issue. In V2.2 the performance in ASN generated weather was ok but in V2.3 my sim grinds to a virtual halt with fps between 10-25 (with volumetric fog UNTICKED. With it ticked I am getting under 10fps!).

 

I shall try what you did on my P3D tonight and see if I get similar improvements to you :)

 

Everyone keeps saying ASN takes control of weather in P3D but I can change the cloud coverage using the slider in P3D weather settings even with ASN injecting weather. Has anyone else noticed this?

 

Adam

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......

 

Everyone keeps saying ASN takes control of weather in P3D but I can change the cloud coverage using the slider in P3D weather settings even with ASN injecting weather. Has anyone else noticed this?......

Hi Adam,

isn't this normal behavior? ASN does the weather but who draws the clouds?

Spirit

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Hope this may be of help. I noticed my default flight begins Selected Weather: 'User-defined', changes to 'Weather Themes' after ASN injects weather, the resulting frame rate is very poor, and GPU utilization is 99%. If I change back to Selected Weather: 'User-defined' using P3Ds /World/Weather menu items anytime after ASN injects weather, then the resulting frame rate is immediately much improved and GPU utilization drops to 35%. ASN's Conditions, Station:, Edit WX, menu items and Load Preset button were used to inject Instrument Conditions.ast weather conditions applied globally during testing.

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Look for something else on your system. My frames are pretty much consistent throughout a flight. Some degradation of fps will occur in heavy cloud coverage over densely populated areas but not bad. Manually changing the weather settings in flight doesn't seem like a good idea and might cause issues.

 

Vic

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HI

 

Posting this in case it helps. When the P3D ASN beta first came out, I was testing it out in a fully overcast situation, and frame rates dropped to the teens, even with cloud density set to "Medium" in P3D.

 

Working carefully through my settings I noticed that I had cloud draw distance in P3D set to 80 Miles, but in ASN I had set cloud options / maximum cloud draw distance to 90 Miles and minimum cloud draw distance to 70 miles.

 

I soon as I set the max cloud draw distance in ASN to MATCH the max cloud draw distance in P3D (80 miles, makes sense; why allow ASN to depict clouds further out that you are allowing P3D to draw, and min cloud distance set to 60), my frame rates jumped 10-15fps, and I was back in upper 20s-30s (happy, given the detailed airport I was at and the thick overcast). And the clouds then extended all the way to the horizon, whereas before I could see where they ended, creating a clear band along the horizon.

 

So maybe check that the cloud max cloud draw distance you set in P3D and ASN match, and see if that makes a difference on your setup. Makes sense to me as if ASN is sending more cloud stuff to P3D than you are allowing it to handle, some extra work has to go on in P3D to filter out the extra cloud?

 

Rob

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